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Hibernomas are lipomas of brown fat. Intradermal spindle cell lipomas are distinct in that they most commonly affect women and have a wide distribution, occurring with relatively equal frequency on the head and neck, trunk, and upper and lower extremities. [7]: 625 [9] Fibrolipoma: Large amounts of fibrous tissue
A boil, also called a furuncle, is a deep folliculitis, which is an infection of the hair follicle. It is most commonly caused by infection by the bacterium Staphylococcus aureus, resulting in a painful swollen area on the skin caused by an accumulation of pus and dead tissue. [1] Boils are therefore basically pus-filled nodules. [2]
The main cellular component of this tissue is the adipocyte, or fat cell. [14] The structure of this tissue is composed of septal (i.e. linear strands) and lobular compartments, which differ in microscopic appearance. [8] Functionally, the subcutaneous fat insulates the body, absorbs trauma, and serves as a reserve energy source. [14]
The scalp, ears, back, face, and upper arm, are common sites of sebaceous cysts, though they may occur anywhere on the body except the palms of the hands and soles of the feet. [4] They are more common in hairier areas, where in cases of long duration they could result in hair loss on the skin surface immediately above the cyst. They are smooth ...
The exact cause of this condition is not known, but it involves collagen degeneration and a granulomatous response in the layer of the skin called the dermis, often affecting the deeper fat layer and thickening dermal blood vessels. Diagnosis is confirmed through a skin biopsy showing inflammatory cell infiltrate and necrotising vasculitis.
The subcutaneous tissue is a layer of fat between the dermis and underlying fascia. [5] This tissue may be further divided into two components, the actual fatty layer, or panniculus adiposus, and a deeper vestigial layer of muscle, the panniculus carnosus. [16] The main cellular component of this tissue is the adipocyte, or fat cell. [5]
The legs and face are the most common sites involved, although cellulitis can occur on any part of the body. [1] The leg is typically affected following a break in the skin. [1] Other risk factors include obesity, leg swelling, and old age. [1] For facial infections, a break in the skin beforehand is not usually the case. [1]
A carbuncle is a cluster of several boils, which is typically filled with purulent exudate (dead neutrophils, phagocytized bacteria, and other cellular components). [5] Fluid may drain freely from the carbuncle, or intervention involving an incision and drainage procedure may be needed. [ 4 ]